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add note about handling non-hazy images #740

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2 changes: 2 additions & 0 deletions content/module-reference/processing-modules/haze-removal.md
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Expand Up @@ -15,6 +15,8 @@ Haze absorbs light from objects in the scene but it is also a source of diffuse

Setting both of the module's controls to unity maximizes the amount of haze removal but is also likely to produce some artifacts. Removing the atmospheric light entirely may render the image flat and result in an unnatural looking style. Optimal values are typically below unity and are rather image dependent, but also a matter of personal aesthetic preferences.

**Important note**: This module is not intended to be used for increasing contrast, even though that is the resulting effect from removing haze. It _will_ fail on many images which do not contain actual haze. To increase contrast on non-hazy images, apply the [_local contrast_](../local-contrast.md) module or use the 4-ways tab in [_color balance rgb_](../color-balance-rgb.md) and reduce the shadows lift luminance.

# module controls

strength
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